Rename by Replacing (In Database)
(In-Database Processing)
Synopsis
This operator can be used to rename a set of columns by replacing parts of the column names by a specified replacement.Description
This operator replaces parts of the column names (like whitespaces, parentheses, or other unwanted characters) by a specified replacement. The replace_what parameter can be defined as a regular expression (please refer to the annex of the RapidMiner tutorial for a description). The replace_by parameter can be defined as an arbitrary string. Empty strings are also allowed. Capturing groups of the defined regular expression can be accessed with $1, $2, $3...
Input
example set input
Output
- example set output
Parameters
- attribute filter type The condition specifies which attributes are selected or affected by this operator.
- attribute The attribute which should be chosen.
- attributes The attribute which should be chosen.
- regular expression A regular expression for the names of the attributes which should be kept.
- use except expression If enabled, an exception to the specified regular expression might be specified. Attributes of matching this will be filtered out, although matching the first expression.
- except regular expression A regular expression for the names of the attributes which should be filtered out although matching the above regular expression.
- value type The value type of the attributes.
- use value type exception If enabled, an exception to the specified value type might be specified. Attributes of this type will be filtered out, although matching the first specified type.
- except value type Except this value type.
- block type The block type of the attributes.
- use block type exception If enabled, an exception to the specified block type might be specified.
- except block type Except this block type.
- numeric condition Parameter string for the condition, e.g. '>= 5'
- invert selection Indicates if only attributes should be accepted which would normally filtered.
- replace what A regular expression defining what should be replaced in the attribute names.
- replace by This string is used as replacement for all parts of the matching attributes where the parameter 'replace_what' matches.